The Exhaust emissions are pollutants released into the atmosphere from vehicle engines, primarily those powered by gasoline and diesel. These emissions include carbon dioxide (CO2), nitrogen oxides (NOx), hydrocarbons (HC), and particulate matter (PM). They contribute significantly to air pollution, posing health risks such as respiratory issues and cardiovascular diseases, and play a major role in climate change by increasing greenhouse gas concentrations. Reducing exhaust emissions involves adopting cleaner fuel technologies, improving engine efficiency, implementing stricter emission standards, and increasing the use of electric and hybrid vehicles. Addressing these emissions is crucial for environmental and public health.